Holder for mower and reaper knives



(Modem J. R. HAMILTON. HOLDER FOR MOWER AND RE'APBR KNIVES.

' Elm-270,790. 'Patented Jan'.16, 1883.

UNirnn STATES PATENT hrice,

JONATHAN R. HAMILTON, OF KINGSTON, ASSIGNOR OF ONE-HALF TO PETERJOHNSON, OF DASSEL, MINNESOTA.

HOLDER FOR MOWER AND REAPER KNIVES.

SPECIFICATION forming part of Letters Patent No. 270,790, dated January16, 1883. Application filed January 11I 1882. (ModeL) To all whom it mayconcern:

Be it known that I, JONATHAN R. HAMIL- TON, of Kingston, in the countyof Meeker and State of Minnesota, have invented a new and 3 ImprovedHolderforlllowerand Reaper Knives while being Ground; and I do herebydeclare that the following is a full, clear, and exact description ofthe same.

Myinvention is an improvement in a class of apparatus adapted forholding the cutter-bars of reapers and mowers while being ground, theconstruction and arrangement being usually such that the cutter-bars areheld fixed at a certain inclination, yet'permitting them to be 1 5 slidlengthwise, so as to bring their knives successively in contact with thegrindstone.

The improvement consists in the construction and combination of parts,as hereinafter described, whereby I produce a simple, cheap,

easily-adj usted, and efficiently-operating apparatus.

In accompanying drawing, the figure illustrates a perspective view ofsaid apparatus as arranged for use.

The letter H indicates a grindstone, which is hung in uprights B B,having a suitable base, A. Rotary motion will in practice be imparted tothe grindstone by means of a crankand treadlc. (Not shown.) Theadjustable frame for supporting the cutter-bar K while being groundconsists of the following parts, to wit: the horizontal slotted bar 0,secured by bolt R to the base A; the vertical standard D, which isattached to said bar 0 by means of a screw, S; the band L, attached tothe slotted upper end of standard D by screw-bolt having nut M; the rodF, that slides freely in said band, and arms G'G G which are adapted toslide on and be removed from the rod F. The 4c cutter-bar K is held inthe outer or free ends of these arms G G G which have notches or openslots to receive the same. The aforesaid bar 0 may be shifted right orleft to enable one to place the cutter-bar K in the required relation tothe stone for grinding either edge of the knives or cutters. The slot insaid bar 0 allows the standard D to be adjusted toward or from the stoneH, and the standard may be turnedon its axis byloosening the clamp-screwS. The band L may also be set higher or lower in the slot 00 of standardD, and it may be inclined at different angles to a horizontal plane.

The manner of using the apparatus is as follows: The cutter-bar K isplaced in arms G G, the arm G2 being detached. The band L is thenadjusted to the proper height by means of bolt M in slot :0 of standardD, and the latter. is also adjusted on bolt 8 and the bar O placed atsuch horizontal angle as to insure the cutter-bar being held at theproper angle tothe face of the stone H. The said parts 0 D L- are thenclamped in such position and the rod F slid to the left until the lastsection of cutter-bar K lies on the faceof the stone, when the grindingis begun. The operator stands erect and works the treadle, (not shown,)and as knife after knife is ground moves the rodF to the right. Afterhaving ground three or four cutters the holding-arm G is put on the rodF, the arm G detached, and the arm G moved to the left to within abouttwo inches from the end of the cutter-bar. After having ground one sideof the knives, l loosen bandnut M, swing arm 0 to the left, or into theopposite diagonal position, and place the cutterbar K at the inclinationrequired for grinding the other edges. If the crank of the grindstone islong, it may prevent this being done, and in such case it will benecessary to place the cutter-bar holding devices on the other 8') sideof the stone, which is effected by aid of the bar W. The latter issecured horizontally to the base A by a bolt, P, passing through itsslotted end, which enables its free end to be swung around intoconvenient proximity to standard D, which is thendetached from bar 0 andsecured to the end of W. The latter is -then swung back into theposition shown in the drawing and the parts D L F adjusted asrequiredfor completing the grinding operation.

1 do not claim an apparatus of this class having devices for holdingacutter-bar which per-' mit it to be adjusted at different inclinationsor moved endwise, as above described.

What I do claim is- 5 1. The combination, with the sliding rod F andband L, made adjustable vertically, and around the bolt whereon it ispivoted, of the arms Gr G G which, are adapted to slide on said rod Fand be detached therefrom, and I00 have notches in their outer ends toreceive the is slotted and adjustable, and the horizontal cutter-bar,all as shown and described. slotted bar 0, all arranged as shown and de-2. The combination, with grindstone-frame scribed, to operate asspecified.

A B, of the sliding detachable arms G Gr Gr JONATHAN B. HAMILTON. 5 forholding the cutter-bar, the sliding rod F, Witnesses:

the rod-holding band L, pivoted and adjnsta- W. S. WHITNEY,

ble, as specified, the vertical standard D, which E. A. BRIGGS.

